Update CustomStyles.h

Typo fix and tiny improvement.

SandboxiePlus/SandMan/CustomStyles.h

@@ -46,7 +46,7 @@ public:
 };
 
 //////////////////////////////////////////////////////////////////////////////////////////////////////
-// Keeps submenus visible when the mosue leaves
+// Keeps submenus visible when the mouse leaves them
 //
 
 class KeepSubMenusVisibleStyle : public QProxyStyle {
@@ -164,4 +164,4 @@ public:
         // For all other controls, draw the default
         QProxyStyle::drawControl(element, opt, p, widget);
     }
-};
+};